Sagot :
-12+34=22
20-35= -35+20= -15
21-35= -35+21= -14
12.5+0.5-15=12.5+0.5+(-15)=13+(-15)=-2
-8-16-24= -8+(-16)+(-24)= -48
31-41-25=31+(-41)+(-25)= -35
Bonsoir,
a) -12+34 = 22
b) 20-35 = 20+(-35) = -15
c) 21-35 = 21+(-35) = -14
d) 12,5+0,5-15 = 12,5-14,5 = 12,5+(-14,5) = -2
e) -8 - 16 -24 = -8+(-16)+(-24) = -8+(-40)= -48
f) 31 -41-25 = 31+(-41)+(-25)= -10+(-25) = -35
Bonne soirée.